来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/10 19:40:20
(2012•庄浪县模拟)下面各题,怎样简便就怎样算:
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(1)( 7 12+ 1 6- 5 24)×24 = 7 12×24+ 1 6×24- 5 24×24 =14+4-5 =13;
(2) 4 29×[1-( 3 4- 3 8)] = 4 29×[1- 3 8] = 4 29× 5 8 = 5 58;
(3) 1 8×59+ 1 8×41 = 1 8×(59+41) = 1 8×100 =12.5;
(4)( 1 3+ 1 2)÷(3+ 2 3) = 5 6÷ 11 3 = 5 22;
(5) 8 17÷23+ 1 23× 9 17 = 8 17× 1 23+ 1 23×
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